Wednesday 26 April 2017 

Speaker: Luigi Delle Rose (RAL/University of Southampton)


Title: "Explanation of the 17 MeV Atomki Anomaly in a U(1)-Extended 2-Higgs Doublet Model”

Abstract: Motivated by an anomaly observed in the decay of an excited state of Beryllium by the Atomki collaboration, we study an extension for the Standard Model with a gauged U(1)' symmetry in presence of a 2-Higgs Doublet Model structure of the Higgs sector. We show that this scenario complies with a variety of experimental results and is able to explain the potential presence of a resonant spin-1 gauge boson, Z', with a mass of 17 MeV in the Atomki experimental data, for appropriate choices of U(1)' charges and Yukawa interactions.